Lead block



K. BERGER March 3, 1936.

LEAD BLOCK 5 Sheets-Sheet 1 Filed Feb. 26, 1934 BERGER 7 BY W ATTORNEY INVENTOR UTE K. BERGER LEAD BLOCK March 3, 1936.

Filed Feb. 26, 1954 3 Sheets-Sheet 2 INVENTOR Km/zz BERGER, 7

Wm XT TORNEY March 3, 1936. BERGER 2,032,464

LEAD BLOCK File d Feb. 26, 1934 5 Sheets-Sheet 3 ATTORN EY Patented Mar. 3, 1936 UNITED STATES PATENT OFFICE LEAD BLOCK Knute Berger, Seattle, Wash. Application February 26, 1934, Serial No. 712,884

'7 Claims. (01. 308-18) This invention relates to improvements in which a supply of lubricant is contained and in sheaves and sheave blocks and it has reference the novel features of construction of retaining more particularly to what are commonly known nuts whereby the pin is held securely in place. in the logging industry as lead blocks, that is, a Also, in the provision of means for positively block wherein a sheave is mounted to carry a locking the retaining nuts against becoming loose 5 running cable whereby logs or the like are transincident to use of the block. ported or moved as in yarding. Third, the provision for quick and easy removal Explanatory to the invention, it will be here of a cable from the block without disassembling stated that in the provision of anti-friction bearthe sheave wheel therefrom.

ings in manganese sheaves, and particularly Fourth, in the provision of a sheave wheel hav- 10 for taper roller bearings, it is necessary to conihg spokes Of a I10Vel design w y strength s sider end thrust, Thus it is a, very important added to the general construction and a cooling tt t t proper and accurate shoulders be fan effect is automatically obtained incident to provided in the sheave hub against which the Operation of the W bearings may seat in a manner to insure accurate other Objects of the invention reside in the 15 n t, Heret f re in such sheaves using tails of construction and in the combination of paired sets of taper roller bearings, spacing collars Darts embodied in t e deV whereby y are have been employed between the two Sets of rendered easily assembled and disassembled. bearings and these collars have either been ex- In accomplishing these and Other j s panded into an annular groove in the sheave hub, the invention, I have provided the p d 20 or pressed into the hub and secured by welding tails Of COIlStIllCtlOll, the preferred forms Of which or cast as a spacer in a recess in the sheave after are illustrated in the a pa y d aw the grinding operation. In each instance it has wherein-- been diff cult t bt proper alinement of Fig. 1 is a side elevation of a sheave and block bearings, embodying the novel features of the present in- 25 Another difiiculty has been to obtain a satis- Vehtienfactory means for positively locking the axle or 2 is a a ss sectional View Of the pivot pin of the sheave that can be readily and e easily removed for disassembling the parts when EL 3 1S a e V ew Of the eave Wheel.

this is desired. Fig. 4 is a cross section of the same. 30

sun another dii'ficulty has been to prevent over- 5 is a a d t al v w illustrating heating of the block by reason of the friction of the locking nllt Constructionthe cable operating about the sheave at high 6 is a partial face View Of the same p speed. Fig. 7 is a cross section on line 1-1 in Fig. 4 In view of the above, and for other reasons, illustrating the spoke Construction 35 the principal objects of the present invention 3 is a sectional View Of a sheave mounting reside in the following features of construction: of a alternative fo m of Construction.

First, in the provision within the sheave wheel 9 is a Cross section 0 e 9-9 n F g. 8. hub of an integrally cast, spacer ring for the Referring more in detail to the d aw s paired anti-friction bearings on which the sheave l designates, in its entirety, the s v l ck 40 is mounted; this ring having projecting buttons and 2 designates the sheave Whee The blOCk, as formed on its opposite sides adapted to be ground seen e in Figs- 1 and 2, comprises an enc s down to accurately seat the bearings; the ring h us n av s p a a d pa d pp t sid also having annular grooves undercutting the plates 3 d between Which the Wheel 2 is O- buttons at the corners formed at the opposite cated, and at their top edges the plates have 45 sides of the ring where it joins the sheave hub, paired y l -4 b tw n which he ends 01 thereby to provide for greater accuracy in and an anchoring y 5 is secured y p A less time required for the surfacing and grinding p link eXtehds between the Plates and s of the buttons in preparing the seats against held by the pins 6. There also are spaced guide which the bearings rest and to provide clearance flanges 1 cast with the side plates within the block 50 that prevents wearing away of the corner of the closely adjacent the top of the sheave to prevent grinding wheel in grinding or surfacing the the cable jumping from the sheave wheel 2. buttons. The wheel in the construction shown in Figs. 2

Second, in the provision of a. chambered or and 4, comprises a cylindrical hub portion 8, a rim tubular mounting pin or axle for the sheave in p r 9 providing an an u ar seat r channel I0 55 for the cable, and integrally cast spokes I I which support the rim from the hub. The sheave wheel is mounted in the block to revolve about a tubular axle or pin I2 which, in turn,'is mounted at its ends in alined openings I3-I3 in the side walls 3- 3 of the block. The pin I2 is held in place by nuts I5 which have shanks threaded into its opposite ends. Also, the nuts have enlarged head portions I5 adapted. to be tightened against the ends of the pin' and also against the bottom surfaces of circular recesses I6I6 in the side walls of the block concentric of the axial line of the pin. It will be observed in Fig. 2 that the ends of the pin I2 terminate flush with the base surfaces of recesses I6I6' and then when the heads I5 of the nuts are tightened against these base surfaces, there can be no end play of the pin.

The pin I2 is hollow or chambered to hold a lubricant and the nuts I 5 that are threaded into its opposite ends are tapped as at I5L and the taps fitted with plugs I5b, as in Fig. 5, to provide for filling and then sealing the pin chamber. A

' 22 into any one of which a part of the nut flange may be outwardly deformed to lock the nut against rotation, as seen at 24 in Fig. 6. This locking is accomplished by applying an outwardly directed blow against that part of the nut flange 2| directly across the notch to break or bend it outwardly, thus to serve as a locking key. To release the nut for rotation, it is only necessary to bend the key portion of the flange back out of the notch by means of a chisel or punch.

The hub portion of the sheave is interiorly provided with an encircling, inwardly extending flange or collar 30; this being cast integrally with the hub, as distinguished from the usual pressed in or welded in ring. Cast on the oppositesides of the collar 30 are laterally projecting buttons 3| of uniform size and spacing and below the buttons, within the corners or angles provided by the hub and collar, are grooves 32 cut into the hub and collar as relief tofacilitate the grinding operation and to prevent wear on the corner of the grinding tool used to face the buttons in preparing seats for the raceways of the bearings.

In preparing the hub for receiving the bearings, it is ground out to true cylindrical form tothe diameter of the bearing cages or raceways that are to be fitted thereto. At the same time the hub is ground out the buttons are surfaced for abutment thereagainst of the outer raceways 36 of the taper roller bearings I4. The inner raceways 31 of these bearings are fitted to: the pin I2 and have a spacer ring 38 between them, and there are spacer rings 39 fitted between the outer ends of the raceways 31 and face plates 33'. Thus, when the nuts are tightened against the pin ends and face plates, the spacers 39, raceways 31 and spacer 38 are clamped tightly together against longitudinal shifting on the pin. Sealing rings 40 are also fitted in the ends of the hub as seen in Fig. 2.

The spokes II connecting the hub and rim of the wheel differ from the usual construction in that they are provided along opposite edges with re-enforcing flanges 4| extending in opposite directions from the hub to the rim. In cross section the hub, as seen in Fig. 7, is of a sort of Z-angle form. This materially strengthens the spoke against bending, with the neutral axis from the center of the sheave extending through the spoke. Furthermore, in this construction each spoke serves in operation as the blade of a fan whereby a forced circulation of air is created to effectively cool the wheel and block regardless of the direction of rotation of the wheel. Cooling is obviously essential since it would cause expansion and a consequent loosening up of the bearings. 7

With the parts of the block and sheave constructed as above described, they may be easily and readily assembled by first locating the two sets of bearings in the hub against opposite sides of the integrally cast spacer ring, and with the sealing rings 40 and spacers 38 and 39 in place, then by locating the sheave in the block and applying the tubular pin through the sheave and openings I3I3' in the block and finally threading the nuts I5-I5' into the pin and locking them by outsetting part or parts of the rim flanges 2| in the recesses 22.

When it is desired to disassemble the parts, it is only necessary to unlock one of the nuts I5-I5 and push the pin I2 through, thus permitting the sheave to be removed from the block. This unlocking may readily be accomplished by disconnectin'g'one face plate 3 or 3' from the yoke 5 and spacer B, then. rotating the plate. which in turn will unscrew the nut I5 that is seated therein.

In Figs. Band 9 is illustrated an alternative construction in which the opposite face plates. 3 and 3' of the block have axially alined openings and 50 with countersunk recesses 5I and 5| about these openings in the outer sides of the plates. The sheave wheelis mounted on a tubu lar pivot pin having an integral head 56 fitted 'in the countersink 5| atthat side of the block. A nut is applied to the other end of the pin and this has a shank'58 threaded into the pin and an enlarged head 59 tightened against the end of the pin and. also against the base of the countersink5l.

The sheave wheel is rotatably mounted on the paired taper bearings as in the device of Fig. 2 and the inner raceways are spaced apart by the spacer ring GI and there are spacer rings 62--62' between the raceways and face plates.

The openings 50-50'in the face plates are of greater diameter than the pivot pin, and the spacer ring 62" has a concentric extension 62a of reduced outside diameter fitted in the opening 50"about the pin. Likewise, the spacer 62 has an annular coaxial extension 62b fitted in the opening 50 of plate 3 and this opening has notches III at intervals therein as seen in Fig. 9 into which a part of the ring extension 62b maybe outwardly deformed as at II, thereby to lock the ring against rotation relative to the plate. Likewise, the ring extension may at certain points be deformed inwardly as at 12, into notches I5 in the adjacent end of the pivot pin to lock the pin against rotation relative to the ring.

With this construction, as shown in Figs. 8 and 9, if it is desired to remove the cable loop from about the sheave, it is only necessary to disconnect face plate 3 from the yoke 5 and spacer 6' then to rotate it one half turn to provide a lateral opening from the top of the sheave. This rotation of the plate is about the extension of ring 62' and does not cause rotation of the 'pivot pin.

Therefore, no looseness will result in the setup and loss of adjustment is not possible. The head 59 of the locking nut is in this instance held against rotation by interlocking its peripheral flange in a notch of the face plate, in the same manner as is illustrated and described in connection with the device of Figs. 1 and 2.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is 1. In a block of the character described having opposite side plates, an axle mounted at its ends in the plates and a sheave wheel revoluble about the axle; said wheel having an axially extended chamber receiving the axle and formed interiorly with an inwardly extending, encircling spacer ring integral with the wheel hub and formed on its opposite side faces with spaced, projecting buttons and an undercut clearance groove in the ring and chamber wall about the buttons, antifriction bearings fitted to the axle within opposite ends of the wheel chamber and having their outer raceways seated against the buttons projecting from opposite sides of the spacer ring.

2. In a device of the character described, a block having opposite face plates formed with axially alined openings an axle member havin its opposite ends mounted in said openings and a sheave wheel revoluble about said axle member; nuts threaded into the ends of said axle member having heads extended to engage the plates about the openings to retain the axle against longitudinal movement; said face plates having countersink recesses about said openings to receive the heads of said nuts with notches formed in the walls of the countersinks and said nuts having rim portions adapted to be deformed outwardly into said notches to lock the nuts against turning.

3. In a device of the character described, a block having opposite face plates formed with axially alined openings therethrough and with countersunk recesses about said openings in the outer faces of the plates, each of said countersunk recesses having a fiat bottom surface and having notches in its side walls, an axle member, a sheave wheel revoluble thereon; said axle having ends fitted in said wall openings and terminating at its ends flush with the bottom walls of the countersunk recesses and nuts having shanks threaded into the ends of said axle and having enlarged heads adapted to be tightened against the said ends and to seat against the bottom walls of said recesses thereby to lock the axle in place; said nut heads having encircling rim flanges adapted to be deformed outwardly into said notches to lock them against turning.

4. A device as in claim 3 wherein the axle member is tubular and has a lateral outlet for a lubricant that may be contained in the tubular chamher, and wherein the nuts are tapped to provide for filling the tubular chamber and have plugs removably applied to said taps.

5. A block having a face plate formed with a circular opening and having one or more notches about the opening, an axial pin mounted in the block with one end extended into said plate opening and provided about that end with one or more notches, a sheave wheel revoluble on the pin, a bearing supporting the wheel on the pin and a spacer ring fitted to the pin between the face plate and said bearing having an annular extension fitted in said plate opening adapted to be deformed into said plate and pin notches to lock the pin and plate against relative rotation.

6. A block having opposite face plates formed with circular, alined openings with notches about the openings, an axial pin mounted with ends disposed in said openings, said pin having a head at one end, and having notches about its opposite end, a sheave wheel on the pin, bearings supporting the wheel revolubly on the pin, spacer rings disposed between the bearings and. face plates and having annular extensions fitted about the pin and extended into said face plate openings and adapted to be deformed into said plate and pin notches to prevent rotation of the pin relative to the face plate.

7. A device as in claim 6 wherein one of said face plates has a revoluble mounting between the head of said. pin and the spacer ring adjacent thereto.

KNUTE BERGER. 

